Drivers with means to distinguish between insufficient bootstrap capacity recharging and a short-circuit fault

摘要

The invention relates to a driver stage with a first power transistor (M), a second power transistor (M) and a bootstrap capacitance (C). The driver has means (UV, GT, GT) to detect a short circuit and / or a discharge of the bootstrap capacitor (C). These means are suitable and intended to distinguish between a short circuit and a discharge of the bootstrap capacitor (C). The driver has one or more means (INTN, DB signaling) to signal a short circuit (S4) and a discharge (S7) of the bootstrap capacitor (C) to a computer system. The signaling is carried out by the driver in the event of a short circuit (S4) differently than in the event of discharge (S7) of the bootstrap capacitor (C).